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A mass of M kg is suspended by a weightless string. The horizontal force that is require to displace until the string makes an angle of 450 with the initial vertical direction is
Asked by akshaykumar999gupta | 25 Apr, 2020, 04:54: PM
Expert Answer
I assume the angular displacement is 45o not 450 as posted in question . I assume this a typo error .
As shown in figure, to make 45o angular displacement, the mass has to be raised vertically to a distance [ l - (l/√2) ]
Hence wrokdone by applied force equals the potential energy gained by the mass
F × (l/√2) = mg × [ l - (l/√2) ]
Hence force F is given by
Answered by Thiyagarajan K | 25 Apr, 2020, 11:17: PM
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